Remove memory boosters/Cleaner Third-party apps: Instead, use system default clearing ram options or try restart device to clear Ram completely. If you still need a memory cleaner use Android Assistant. Do not use anything that auto clean memory.

Try Reinstalling War - Card Game :Free Game: First, remove it from the device then restart and then reinstall the game. This will refresh the game files.

Block Unimportant Notifications: Notifications arrival may slow down the War - Card Game :Free and create screen blockage and also consumes CPU and memory, Block unnecessary notifications to boost device performance.

Updates: keep your device updated always install latest game version and keep your system software update you can do system update by going to setting -> about and then check for updates and further install it to boost device performance.

Remove or disable unwanted software from android to free up memory to increase War - Card Game :Free performance.

If you still face any game issue you can ask here don’t forget to mention your device model name and version.